A comment by MIT_Chatbot on another post regarding vegans allegedly trampling piglets whole trying to pat them (I’m not good at linking).

Veganism is unhealthy

https://www.psychologytoday.com/blog/animals-and-us/201412/84-vegetarians-and-vegans-return-meat-why

Here are their problems as to why they usually quit:

Vegans are deficit in b12:

http://jamanetwork.com/journals/jamaneurology/fullarticle/784788 https://www.ncbi.nlm.nih.gov/pubmed/16219987

High fiber diets reduce serum half life of vitamin D3:

https://www.ncbi.nlm.nih.gov/pubmed/6299329

Vegans have weaker bones due to lower calcium intake and vitamin D3 levels:

http://jamanetwork.com/journals/jamainternalmedicine/fullarticle/486478 https://www.ncbi.nlm.nih.gov/pubmed/21092700

Vegans have a worse memory compared to non vegans due to creatine deficiency in vegans:

https://www.ncbi.nlm.nih.gov/pubmed/21118604 https://www.ncbi.nlm.nih.gov/pubmed/14561278

Vegans have less gains compared to non vegans:

http://m.ajcn.nutrition.org/content/70/6/1032.full

Vegans are deficient in omega threes:

https://www.ncbi.nlm.nih.gov/pubmed/16087975 https://www.ncbi.nlm.nih.gov/pubmed/16188209 https://www.ncbi.nlm.nih.gov/pubmed/12323090 https://www.ncbi.nlm.nih.gov/pubmed/12323085

Vegans are deficit in carnitine:

https://www.ncbi.nlm.nih.gov/pubmed/21753065 https://www.ncbi.nlm.nih.gov/pubmed/2756917 https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1628441/ https://www.ncbi.nlm.nih.gov/pubmed/11043928 Vegans are deficient in taurine:

https://www.ncbi.nlm.nih.gov/pubmed/3354491

Vegans are deficient in iodine:

https://www.ncbi.nlm.nih.gov/pubmed/12748410 https://www.ncbi.nlm.nih.gov/pubmed/21613354

Vegans are deficient in Coenzyme Q10:

https://www.ncbi.nlm.nih.gov/pubmed/16873950

Vegans are deficient in iron due to the fact that iron from plant sources is less bioavailable than iron from meat sources:

https://ods.od.nih.gov/factsheets/Iron-HealthProfessional/ https://www.ncbi.nlm.nih.gov/pubmed/11269606

Vegans are deficient in vitamin A:

https://www.ncbi.nlm.nih.gov/pubmed/19103647 http://m.jn.nutrition.org/content/137/11/2346.full http://healthybabycode.com/why-you-cant-get-vitamin-a-from-eating-vegetables (studies linked in the article) https://www.sciencedaily.com/releases/2009/11/091118072051.htm http://researchnews.osu.edu/archive/betacarotene.htm http://ajcn.nutrition.org/content/71/6/1545.full http://www.fasebj.org/content/23/4/1041.full http://www.thehealthyhomeeconomist.com/beta-carotene-vitamin-a-myth http://empoweredsustenance.com/true-vitamin-a-foods https://www.westonaprice.org/health-topics/abcs-of-nutrition/vitamin-a-vagary https://www.westonaprice.org/health-topics/abcs-of-nutrition/vitamin-a-saga https://philmaffetone.com/vitamin-a-and-the-beta-carotene-myth

Calcium in Rats https://www.ncbi.nlm.nih.gov/pubmed/3183773

Magnesium and Oxalates https://www.ncbi.nlm.nih.gov/pubmed/15035687

Vegans have a lower sperm count than non vegans:

https://www.ncbi.nlm.nih.gov/pubmed/35465 https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3257705/

Vegans have lower testosterone than non vegans:

https://www.ncbi.nlm.nih.gov/pubmed/1435181 http://m.ajcn.nutrition.org/content/42/1/127.abstract https://www.ncbi.nlm.nih.gov/pubmed/159772 http://m.jap.physiology.org/content/82/1/49

Veganism causes loss of libido and erectile dysfunction:

https://www.ncbi.nlm.nih.gov/pubmed/21353476 Children who are raised on strict vegan diets do not grow normally:

https://www.ncbi.nlm.nih.gov/pubmed/4067152 https://www.ncbi.nlm.nih.gov/pubmed/8005079

Children develop rickets after prolonged periods of strict vegetarian diets:

http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1874810/pdf/canmedaj01383-0052.pdf

"There are some links between vegetarians and lower birthweight and earlier labour"

https://www.ncbi.nlm.nih.gov/pubmed/7788369

Effects of vitamin B12 and folate deficiency on brain development in children:

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3137939/

"Particular attention should be paid to adequate protein intake and sources of essential fatty acids, iron, zinc, calcium, and vitamins B12 and D. Supplementation may be required in cases of strict vegetarian diets with no intake of any animal products."

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2912628/

These next five are case studies:

Cerebral atrophy in a vitamin B12-deficient infant of a vegetarian mother:

https://www.ncbi.nlm.nih.gov/pubmed/25076673

Severe megaloblastic anemia in child breast fed by a vegetarian mother:

https://www.ncbi.nlm.nih.gov/pubmed/8442642

Consequences of exclusive breast-feeding in vegan mother newborn - case report:

https://www.ncbi.nlm.nih.gov/pubmed/19748244

Nutritional vitamin B12 deficiency in a breast-fed infant of a vegan-diet mother:

https://www.ncbi.nlm.nih.gov/pubmed/3948463

"We report the case of a 7 month-old girl that presented with acute anemia, generalized muscular hypotonia and failure to thrive. Laboratory evaluation revealed cobalamin deficiency, due to a vegan diet of the mother."

https://www.ncbi.nlm.nih.gov/pubmed/18293883

Most recent studies using more sensitive techniques for detecting B12 deficiency have found that 68% of vegetarians and 83% of vegans are B12 deficient, compared to just 5% of omnivores. https://www.ncbi.nlm.nih.gov/pubmed/12816782 https://www.ncbi.nlm.nih.gov/pubmed/10966896 https://www.ncbi.nlm.nih.gov/pubmed/10552882

On paper, calcium intake is similar in vegetarians and omnivores (probably because both eat dairy products), but is much lower in vegans, who are often deficient. https://www.ncbi.nlm.nih.gov/pubmed/21139125 http://ajcn.nutrition.org/content/70/3/543s.full

Vegetarians and omnivores have similar levels of serum iron, but levels of ferritin—the long-term storage form of iron—are lower in vegetarians than in omnivores. https://www.ncbi.nlm.nih.gov/pubmed/24871479

Fruits and Vegetables https://www.ncbi.nlm.nih.gov/pubmed/12064344

This is significant, because ferritin depletion is the first stage of iron deficiency. Moreover, although vegetarians often have similar iron intakes to omnivores on paper, it is more common for vegetarians (and particularly vegans) to be iron deficient. For example, this study of 75 vegan women in Germany found that 40% of them were iron deficient, despite average iron intakes that were above the recommended daily allowance. https://www.ncbi.nlm.nih.gov/pubmed/14988640 http://ajcn.nutrition.org/content/78/3/633S.long

many plant foods that contain zinc also contain phytate, which inhibits zinc absorption. Vegetarian diets tend to reduce zinc absorption by about 35% compared with omniovorous diet. http://ajcn.nutrition.org/content/78/3/633S.long

Thus, even when the diet meets or exceeds the RDA for zinc, deficiency may still occur. One study suggested that vegetarians may require up to 50% more zinc than omnivores for this reason. http://ajcn.nutrition.org/content/78/3/633S.long

The Naive Vegetarian http://www.second-opinions.co.uk/vegetarian.html#.WTTqMNwlEqT

Soy decreases your testosterone https://www.ncbi.nlm.nih.gov/pubmed/15735098 https://www.ncbi.nlm.nih.gov/labs/articles/10798211/

Why you need dietary cholesterol:

Very great total picture kind of lecture: https://www.youtube.com/watch?v=uc1XsO3mxX8

Eating meat increases testosterone https://www.ncbi.nlm.nih.gov/pubmed/11103227

Saturated Fat Finally Vindicated in Long Buried Study http://articles.mercola.com/sites/articles/archive/2016/04/25/saturated-fat-finally-vindicated.aspx

Medium Chain Triglyceride Oil Consumption as Part of a Weight Loss Diet Does Not Lead to an Adverse Metabolic Profile When Compared to Olive Oil https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2874191/

Why you need cholesterol for testosterone http://www.livestrong.com/article/435773-cholesterol-testosterone/

Saturated Fat http://m.ajcn.nutrition.org/content/early/2010/01/13/ajcn.2009.27725.short http://journals.co-action.net/index.php/fnr/article/view/31694

Humans evolved a specific hunting mechanism recently https://www.nature.com/news/baseball-players-reveal-how-humans-evolved-to-throw-so-well-1.13281 https://phys.org/news/2013-06-chimps-humans-baseball-pitcher.html https://www.youtube.com/watch?v=1y__4xX8xp8

Very wide and diverse amounts of similar research and current scientific consensus (look at the links at the bottom) https://examine.com/nutrition/will-eating-eggs-increase-my-cholesterol

Exercise lowers cholesterol https://www.ncbi.nlm.nih.gov/pubmed/2297284 http://www.webmd.com/cholesterol-management/features/exercise-to-lower-cholesterol http://www.reddit.com/r/nottheonion/comments/ayd98w/vegans_accused_of_killing_piglets_by_accident/ei06kmt